S. V. Patel, S. K. Gowani, S. R. Shah, and S. D. Malhotra, “Evaluation of clinical efficacy and safety of natural micronized progesterone in prevention of preterm labor: a prospective study at tertiary care teaching hospital in India”, Int J Basic Clin Pharmacol, vol. 8, no. 5, pp. 827–830, Apr. 2019.